:root {
  --cyan: #00ACC1;
  --cyan-deep: #00838F;
  --cyan-dark: #006064;
  --ink: #102A33;
  --mute: #4E6770;
  --paper: #F4FAFC;
  --card: #FFFFFF;
  --border: #D5E8EE;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', sans-serif;
  color: var(--ink);
  background: linear-gradient(160deg, #E3F4FB 0%, #F4FAFC 45%, #EEE8F8 100%) fixed;
  line-height: 1.65;
  font-size: 16px;
}
a { color: var(--cyan-deep); }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }

header.site {
  background: linear-gradient(120deg, var(--cyan) 0%, var(--cyan-deep) 55%, var(--cyan-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 18px rgba(0, 96, 100, 0.25);
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding-top: 12px; padding-bottom: 12px; }
header.site .brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 800; font-size: 20px; letter-spacing: .4px; }
header.site .brand img { width: 38px; height: 38px; border-radius: 10px; background: #fff; }
header.site nav { display: flex; flex-wrap: wrap; gap: 4px; }
header.site nav a { color: #fff; text-decoration: none; font-weight: 600; font-size: 14px; padding: 6px 10px; border-radius: 8px; }
header.site nav a:hover, header.site nav a.on { background: rgba(255, 255, 255, 0.18); }
header.site nav a.cta { background: #fff; color: var(--cyan-deep); }

.hero { padding: 42px 0 18px; }
.hero h1 { font-size: 34px; line-height: 1.2; margin: 0 0 12px; }
.hero p.lead { font-size: 18px; color: var(--mute); margin: 0 0 18px; max-width: 760px; }
.btn { display: inline-block; padding: 11px 20px; border-radius: 12px; font-weight: 700; text-decoration: none; margin: 4px 8px 4px 0; }
.btn.primary { background: var(--cyan-deep); color: #fff; box-shadow: 0 6px 16px rgba(0, 131, 143, 0.3); }
.btn.ghost { background: #fff; color: var(--cyan-deep); border: 1px solid var(--border); }

main { padding-bottom: 30px; }
section.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px 24px;
  margin: 18px 0;
  box-shadow: 0 6px 20px rgba(16, 42, 51, 0.06);
}
section.card h2 { margin: 0 0 10px; font-size: 22px; color: var(--cyan-dark); }
section.card h3 { margin: 18px 0 6px; font-size: 18px; }
section.card p, section.card li { color: #22404A; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.grid .item { background: var(--paper); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; }
.grid .item h3 { margin: 0 0 6px; font-size: 17px; color: var(--cyan-dark); }
.grid .item p { margin: 0; font-size: 15px; }
ol.steps li { margin-bottom: 10px; }
details { border-bottom: 1px solid var(--border); padding: 10px 0; }
details summary { cursor: pointer; font-weight: 700; }
details p { margin: 8px 0 0; }
.muted { color: var(--mute); font-size: 14px; }

footer.site { background: #0B2A31; color: #CFE3E8; padding: 26px 0; margin-top: 20px; font-size: 14px; }
footer.site a { color: #fff; text-decoration: none; margin-right: 14px; display: inline-block; margin-bottom: 6px; }
footer.site .copy { margin-top: 10px; color: #8FB3BC; }

@media (max-width: 640px) {
  .hero h1 { font-size: 27px; }
  header.site nav a { font-size: 13px; padding: 5px 8px; }
  section.card { padding: 18px; }
}